Use the installers to install the new version. Best practice is to use a new folder for the installation and integrate the version of inspectIT into the folder name.
Necessary adaptions
From this version inspectIT provides option to force creation of the MBean server. Thus, if you are monitoring the JMX attributes using inspectIT make sure that MBean server is created or forced by inspectIT. If the server is not created the monitoring of the attributes will not be possible, as simply inspectIT does not have where to read the data.